1. Key Laboratory of Fermentation Technology, School of Bioengineering; Dalian Polytechnic University; Dalian 116034 Liaoning China
2. Department of Biochemistry; Fushun Teachers College; Fushun 113000 Liaoning China
3. College of Life Science; Dalian Nationalities University; Dalian 116600 Liaoning China
4. Ganjingzi District Center for Disease Control and Prevention of Dalian; Dalian 116031 Liaoning China